Solving one-step equations n+(-28)=0

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.

Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site